adding index variables to for loops

gh-118
whitespace cleanup
changing `is not` to work like `isnt`

gh-112
reading version from package.json so it isn't in two places
fixing bug where late bindings caused classes to get `var` definitions

closes gh-109
fixing (major) bug with the command line eval tool

closes gh-120
bump to 0.5.5
added support for block and multiline strings

gh-111